{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FOD817BS","brand":"onsemi","brandSlug":"onsemi","productSlug":"FOD817BS","canonicalUrl":"https://icboms.com/onsemi/FOD817BS","factsUrl":"https://icboms.com/api/mcp/products/FOD817BS","rawCanonicalId":null},"summary":{"shortDescription":"onsemi FOD817BS single-channel phototransistor optocoupler, 5000Vrms isolation, DC input, transistor output, 130-260% CTR, 4-SMD Gull Wing package, -55 to 110°C.","salesMarkdown":"## Isolation barrier and working voltage fit The FOD817BS delivers 5000Vrms isolation between input and output — a reinforced-grade barrier suitable for mains-referenced circuits, motor-drive feedback, or any application where the secondary side must be galvanically isolated from the primary control logic. With a DC input and phototransistor output, this is the standard optocoupler topology for isolating logic-level signals up to 70V and 50mA on the output side. ## CTR range and drive margin Current transfer ratio spans 130% to 260% at a forward current of 5mA — the minimum CTR of 130% ensures the output transistor saturates with enough margin to drive a standard CMOS or TTL input even when the LED is driven at its lower end. The 200mV Vce saturation at 50mA output means the collector-emitter voltage drop stays low when sinking current, keeping the output logic-low level well within the threshold of a 3.3V or 5V receiver. ## Temperature grade and switching speed Rated for -55°C to 110°C operating ambient — the industrial temperature grade covers outdoor telecom cabinets, factory-floor PLC racks, and under-hood automotive modules (though not formally AEC-Q qualified per the record). Typical rise and fall times of 4µs and 3µs respectively give a practical switching ceiling around 50-100 kHz for isolated data or PWM signals — fast enough for most sensor feedback and gate-drive isolation, though not for high-speed digital buses. Housed in a 4-SMD Gull Wing package (supplier device package 4-SMD), the FOD817BS is a surface-mount device that reflows on standard pick-and-place lines. The Gull Wing leads provide good solder joint inspection access and mechanical compliance on FR4. Supplied in Tube packaging — the tube format is typical for low-volume assembly or prototyping; for high-volume reel packaging, check the FOD817 series ordering options.","metaTitle":"onsemi FOD817BS Optoisolator, 5000Vrms, 4-SMD Gull Wing","metaDescription":"onsemi FOD817BS single-channel phototransistor optocoupler, 5000Vrms isolation, 130-260% CTR at 5mA, -55 to 110°C. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tube","Input Type":"DC","Output Type":"Transistor","Mounting Type":"Surface Mount","Package / Case":"4-SMD, Gull Wing","Product Status":"Active","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"FOD817","Voltage - Isolation":"5000Vrms","Vce Saturation (Max)":"200mV","Operating Temperature":"-55°C~110°C","Rise / Fall Time (Typ)":"4µs, 3µs","Voltage - Output (Max)":"70V","Supplier Device Package":"4-SMD","Current - Output / Channel":"50mA","Current Transfer Ratio (Max)":"260% @ 5mA","Current Transfer Ratio (Min)":"130% @ 5mA","Voltage - Forward (Vf) (Typ)":"1.2V","Turn On / Turn Off Time (Typ)":"-","Current - DC Forward (If) (Max)":"50 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/97f795ec3476128abe24ed3f2e223d6c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the isolation rating of FOD817BS?","answer":"The FOD817BS provides 5000Vrms isolation between input and output, which qualifies as reinforced isolation for mains-voltage separation in most industrial and consumer applications."},{"question":"What is the current transfer ratio (CTR) range of FOD817BS?","answer":"CTR is specified at 130% minimum and 260% maximum, tested at a forward current of 5mA. This range ensures consistent logic-level output across LED drive variations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/FOD817BS","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/FOD817BS when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}